Facebook sharing debugger is fetching OG image from different redirected url rather than mentioned in the og:url meta tag

I am working on the OG:image functionality and for that added the all necessary tags in the tag of HTML like og:image og:url

I am debugging the below link in the Facebook sharing debugger

https://www.arttoframe.com/19x11-Satin-Black-collage-picture-frame-2-opening-Tulip-and-Black-mat/190/FRBW26079

My og:URL is same as I am hitting in the debugger as below

https://www.arttoframe.com/19x11-Satin-Black-collage-picture-frame-2-opening-Tulip-and-Black-mat/190/FRBW26079

When I check page source my og: image is no fetched from the above URL but instead it fetched from https://www.arttoframe.com/ Also, Facebook debugger shows it as canonical URL and shows the URL redirect From https://www.arttoframe.com/19x11-Satin-Black-collage-picture-frame-2-opening-Tulip-and-Black-mat/190/FRBW26079 To https://www.arttoframe.com/

So why is this getting redirected? and its not page the og:image from the page source of https://www.arttoframe.com/19x11-Satin-Black-collage-picture-frame-2-opening-Tulip-and-Black-mat/190/FRBW26079

So how can I fetch the image from URL that is being debugged and why it is redirecting to another though I have followed the guidelines?

Help is appreciated...